Air compressor



July 12, 1932. R SAUSBURY 1,866,822

AIR COMPRESSOR Filed NOV, 20, 1950 22 ll 4 39 4 5/ /7 i 9 M 4/ Wh To I:I] H I 62 8 l In ven-for Pal 0b Ja/I'sbury drawing accompanying PatentedJuly 12, 1932 UNITED STATES RALPH SALISBURY, OF LANCASTER, CALIFORNIAAIR COMPRESSOR Application filed November 20, 1930. Serial No. 496,916.

This invention relates to compressors, and has for an obj ect theprovision ofan unusually efficient compressor which is of relativelylight and simple construction.

A more detailed object is to provide a compressor having preferably apair of opposed cylinders disposed diametrically with respect to acircular frame and mounted thereon for rotation about the axis thereof,each of the cylinders having a piston reciprocable therein and carriedby a shaft which is journaled upon the frame eccentrically with respectthereto, so that the pistons reciprocate within their respectivecylinders when the shaft and cylinders rotate together. i i

nother object is to provide guiding means whereby the cylinders arecarried in rotary motion with respect to the frame when torque isapplied to the shaft.

Another object is to provide novel means for withdrawing the compressedfluid from the cylinders, this means being in the form of flexible tubesleading from the outlet valves of the cylinders to a bore which isprovided in the shaft, and a discharge tube leading from the bore,whereby the fluid compressed by the device of the present invention maybe conducted therefrom.

The invention possesses other objects and advantageous features, someof' which, with those enumerated, will be set forth in the followingdescription of the inventions particular embodiment which is illustratedin the and forming apart of the specification.

Referring to the drawing: 1

Fig.1 is a view in side elevation of a compressor embodying theprinciples of the present invention. I

Fig.2 is a vertical sectional view taken upon the line 2[2 of Fig. 1,with the direction of View as indicated.

Fig. 3 is a vertical sectional view taken in a plane perpendicular tothat of Fig. 2 upon the line 3-3 of that figure, with the direction ofview as indicated.

Fig.4 is a horizontal sectional view taken upon the line H of Fig. 1,with the direction of view as indicated.

In its preferred embodiment, the compressor of the present inventioncomprises a frame 6, having a circular track 7 supported preferably in avertical plane upon a suitable base 8. igidity is imparted to the track7 by a l plurality of arms 9 which radiate from a common center, which,however, 1nstead of being at the axis of the track 7 is disposed aroller 12 journaled at each end of the housing 11, and engaging theinner face of the track7. Spaced peripheral flanges 13 on each of therollers 12' engage the sides of the track 7, so as to prevent lateraldisplacement of the housing 11. The each of the rollers 12 spaced lugs14 extending end of the housing 11, and having a pin 16 extendingtherebetween, the roller 12 being journaled upon the pin 16 between thelugs 14, as clearly shown upon Fig. 2.

A 6, with the axis ofthe shaft 17 passing through the point from whichthe arms 9 on each side of the frame 6 radiate, with the result that theshaft 17 is disposed eccentrically with respectto the circle describedby the track 7 Journals 18 and 19 are supported upon the arms 9 at thetwo sides of the frame means for mounting comprises a pan of from theassoclated shaft 17 is journaled upon the frame 6, so as to providesuitable support for the I w;

shaft 17. That portion 21 of the shaft 17 8 which extends between thetwo journals 18 and 19 is non-circular in cross sectional configuration,preferably square, and carries a pair of guides'22 rigid therewith, eachof these guides 22 extending from both sides of U the shaft 17 inopposite directions. Moreover, the square portion 21 of the shaft 17extends through opposed slots 23 in the cyl inder housing 11, theseslots being disposed in l parallelism with the axes of opposed cylingders 26 and 27 which are formed within the housing-11. Each of theguides 22 is slidably disposed within a guideway 28 in the associatedside of the cylinder housing 11,-

whereby rotary motion of the housing 11 with ice the shaft 17 iseffected, but reciprocatory motion of the housing 11 with respect to thecircle described by the track 7 upon which the housing 11 is guided.

Pistons 81 and 32 are rigidly connected to the shaft 21 by means ofpiston rods 33 and 34, respectively, and are slidably disposed withinthe cylinders 26 and 27 respectively. Hence, as rotation of the housing11 occurs and one of the cylinders, say the cylinder 26, moves from itsuppermost position towards its lowermost position, the cylinder 26 willmove radially away from the" shaft 17, causing a partial vacuum to bedeveloped between the piston 31 and the outer cylinder. I

Each of the cylinders-is provided with an inlet port-36 and an outletport 37, each of which is provided with a suitable check valve 38.,Hence, whenthis partial vacuum is developed, air will be drawn into thecylinder through the inlet port 36, andas soon as the cylinder hasreached its-lowermost extreme of motion and starts its upward motion,the checkvalve 38 associated with the inlet port 36 will close, with theresult that as upward motion of the cylinder occurs the only exit forthe air which is becoming compressed is through the outlet port 37 Thecheck valve 38 of each outlet port 37 communicates by means of aflexible tube 39 with a bore 41 which isprovided in .one end of theshaft 17. This end of the shaft 17 is revolubly re ceived within astuffing box 12 carried by an extension 43 which extends rigidly fromthe journal 18, and from the stuffing box 12 any suitable discharge tube44 leads.

Inasmuch as the cylinder housing 11 is connected to the shaft 17 bymeans of the radially extending guides 22, rotation of the shaftwill'cause similar rotation of the cylinder housing 11. Accordingly, anysuitable means for rotating the'shaft 17 are employed, such as asprocket wheel 46 secured to the-endof the shaft 17 opposite thatwhich-is engaged within the stuffing box 42. v

I prefer to construct each of the guides 22 in such a manner that it isroughly channel shaped in cross sectional configuration, as best shownupon Fig. 4, having a flange 51 extending from each side of the guide22,

.and slidably engaging the outer face of the cylinder housing 11. Aplurality of ribsor beads 52 are provided within the channel defined byeach guide 22, which serve not only to strengthen the entireconstruction, but also aid in the dissemination of heat generated duringemployment of the device for compressing gases.

It is to be understood that the details of the invention as hereindisclosed, are subject to alteration within thespirit or scope of theappended claims.

I claim-p 1. A compressor comprising a frame, a cirend of the I track,

cular track thereon, a cylinder housing mounted on said track forrotation about the axis thereof, said housing having a cylinder disposedradially w1th respect to said circular track, a shaft perpendicular tothe axis cular track thereon, a cylinder housing disposed radially ofsaid track and mounted thereon for rotation about the axis thereof,opposed cylinders carried by said housing, a shaft perpendicular to theaxes of said cylinders and journaled on said frame eccentrically withrespect to said track, a piston slidably disposed within each of saidcylinders, each of said pistons being rigidly connected to said shaft,and means on said shaft slidably engaging said cylinder housing torotate the housing with the'shaft.

3. A compressor comprising a frame, a circular track thereon, a cylinderhousing disposed radially of said track, rollers journalcd on saidhousing and engaging said track to guide the housing in rotation aboutthe axis of said track, opposed'cylinders carried by said housing, ashaft perpendicular to the axes of said cylinders and journaled on saidframe eccentrically with respect to said track, a piston slidablydisposed within each of said cylinders, each of said pistons beingrigidly connected to said shaft,and means on said shaft slidablyengagingv said cylinder housing to rotate the housing with the shaft.

4. A compressor comprising a frame,a circular track thereon, a cylinderhousing disposed within the circle described by said means on saidhousing engaging said track and guiding said housing in rotation aboutthe axis of the track, a plurality of cylinders carried by said housingand arranged radially with respect to said circle, a shaft journaledeccentrically of said circle and disposed perpendicularly to the-axes ofsaid cylinders, a piston slidably disposed in each of said cylinders andrigidly connected to said shaft, and a guide slidably engaging each ofsaid cylinders-in parallelism with the axis thereof, each of said guidesbeing rigid with said shaft.

5. A compressor comprising a frame, a circular track thereon, a-cylinderhousing disposed within the circle described by said track, means onsaid housing engaging said said cylinders andrigidly connected to saidshaft, and a guide rigid with said shaft and slidable Within a guidewayin said housing, extending diametrically with respect to said circle.

In testimony whereof I name to this specification.

RALPH SALISBURY.

have signed my

